The new Picco GT engine is fantastic right out of the box extremely powerful and great fuel milage. Great price Too!

The Novarossi ISON is also a great engine but probably needs to be modified by Murnan for example to be on a par with the Picco out of the box. This is added expense which makes the Picco better value for money in my book.

Either engine is good but I'd go with the Picco for best bang for buck.